RM L10: Representing data -

Question 1

What 3 things do graphs show us?

Lesson 10

Answer 1

• Provide an overall picture
• Helps to see patterns
• Summarise results

Question 2

What are bar charts?

Lesson 10

Answer 2

• Used for categorical data
• As data is not continous > there are gaps between the bars
• Y : frequency
• X : category
• Bars represent seperate categories

Question 3

What are scattergraphs

Lesson 10

Answer 3

• Sometimes referred to as scatterplots / scattergraphs
• Used for correlations
• Shows a relationship between 2 variables
• We add a line of best fit
  1. Enter ppt first score on x - axis
  2. Enter ppt second score on y - axis
  3. Find ppt score on x - axis then read from y - axis

Question 4

What are histograms?

Lesson 10

Answer 4

• Used for continous data
• No space between bars
• X : data category
• Y : frequency
• Y : horizontal axis
• X : Vertical axis